18705609

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{149}}^1$

素因数の和:234

約数の個数: 48

約数和(自身を含む): 31122000

約数和(自身を除く): 12416391

約数列:

[1, 3, 9, 13, 29, 37, 39, 87, 111, 117, 149, 261, 333, 377, 447, 481, 1073, 1131, 1341, 1443, 1937, 3219, 3393, 4321, 4329, 5513, 5811, 9657, 12963, 13949, 16539, 17433, 38889, 41847, 49617, 56173, 71669, 125541, 159877, 168519, 215007, 479631, 505557, 645021, 1438893, 2078401, 6235203, 18705609]

約数ペア:

[(1, 18705609), (3, 6235203), (9, 2078401), (13, 1438893), (29, 645021), (37, 505557), (39, 479631), (87, 215007), (111, 168519), (117, 159877), (149, 125541), (261, 71669), (333, 56173), (377, 49617), (447, 41847), (481, 38889), (1073, 17433), (1131, 16539), (1341, 13949), (1443, 12963), (1937, 9657), (3219, 5811), (3393, 5513), (4321, 4329)]